https://ascii.jp - news/press releases, seems to go back into the 90's without needing to use the wayback machine.

https://impress.co.jp - news/press releases https://av.watch.impress.co.jp https://pc.watch.impress.co.jp

phileweb.com - general A/V news site with a database of products, frequently linking to press releases

kakaku.com - pricing / release date (release dates prior to 2001~ are frequently wrong)

yodobashi.com - pricing / release date (release dates prior to 2001~ are frequently wrong)